Experts use the phrase “effective dose” to describe how much radiation your body absorbs. Different types of tissue are more sensitive than others. The amount you absorb during a CT scan of your belly, for example, is different than the amount during a scan of your head. The unit doctors...
administration for computed tomography scan in emergency: a possible cause of contrast-induced nephropathy[J]. Radiol Res Pract, 2015, 2015: 805786. DOI:10.1155/2015/805786. 原文:全身增强计算机断层扫描在严重创伤救治中的价值。高甲科 冯辉 马丽梅 朱建军 刘励...
Methods:We performed a retrospective cohort study through electronic chart review of patients undergoing sinus CT scans (standard and 3D navigation protocols) from May 2019 to December 2019 using a Siemens Drive (VA62A) CT scanner. The effective dose of radiation was calculated in mSv for all ...
下颌骨离体标本进行ProMax 3D Mid扫描,采用5组方案进行扫描,分别为组A:90 kV/6.3 mA, 组B:90 kV/8.0 mA,组C:90 kV/10.0 mA,组D:75 kV/8.0 mA,组E:60 kV/8.0 mA,扫描共得到40个CBCT图像;并记录不同扫描条件下的体表入射剂量(entrance surface dose,ESD)及CT剂量指数(computed tomography dose index...
The puncture time (from the planned CT scan to the post-plugging CT scan) was 20.46 ± 2.92 min, and the radiation dose was 598.93 ± 77.62 mGycm (Table 2). For the patients whose puncture channel was plugged, 109 of them had a CT scan during the continued 30 to 37 ...
The depiction of bone, cartilage and ligaments in MDCTA with any form of dose reduction was inferior to any CBCTA scan with at least 0.6 mAs per pulse (all p < 0.001). Full-dose MDCTA and low-dose CBCTA were of equal quality for bone tissue visualization (p = 0.326), whereas CBCT...
Inclusion and exclusion flow chart Full size image Table 1 Study baseline characteristics including clinical and CT radiation dose parameters Full size table Imaging results The iodine measurements performed for the different contrast groups (100 and 120 mL) demonstrate that the average iodine contrast...
Fig.3 CT projection sampling, reconstruction flow chart 图 3 CT 投影采样,重建流程示意图 (a) 全采样投影 (b) 稀疏均匀采样 (c) 稀疏非均匀采样 (d) 均匀片段缺失采样 (e) 非均匀片段缺失采样 Fig.4 Incomplete projection data sinograms distribution 图 4 不完全投影数据采样方式正弦图分布 2 采样策略...
3 This seems to be feasible by using accelerated hyperfractionated radiotherapy (HART,4 CHARTWEL5, 6), which increases toxicity, or by increasing the dose delivered to the target volumes, but it has been proven that the tolerance of surrounding organs at risk inhibits this effort.7 On the ...
CT scan is associated with a significant dose of radiation, which restricts its application in certain patients, such as pregnant women. MRI does not involve radiation exposure, which allows for frequent repeat imaging and it could be applied in at-risk patients, such as pregnant women18. Furthe...